Efficacy of Two Plant Extracts against Pectinophora gossypiella (Saunders) and Affected Biological Aspects Under Laboratory conditions

Efficacy of two plant extracts; Sweet Annie, Artemisia annua L. (Asteraceae) and hot pepper, Capsicum annuum L. (Solanaceae) against the pink bollworm, Pectinophora gossypiella (Saund.) were studied either alone and/or in a mixture. Toxicity of tested extracts was recorded against immature stages of the pest and on some of its effects on some biological aspects. Obtained data showed that the-mixture had the best efficacy against P. gossypiella than using each extract alone. The newly hatched larvae of P. gossypiella were more susceptible than egg stage. On the other hand, 4-day old eggs were the most susceptible than other egg ages (1, 2 and 3-day old egg). The biological parameters studied revealed that tested extracts affected larval, life cycle, life span duration, egg laying rate, the percentages of egg hatchability and fecundity of P. gossypiella. Meanwhile, the pupal duration and sterility% were increased than the control. Life table parameters were also affected by the tested extracts. Female progeny/female (Mx), survival rate (Lx), generation time (T), net reproductive rate (Ro), intrinsic rate of natural increase (r(m)) and finite rate of increase (e(rm)) were decreased in comparison to control, while doubling time (DT) was increased compared to control.